| Royal Palm Beach to Mangualde | 4,160.03 mi (6,694.93 km) |
| Royal Palm Beach to Marco de Canavezes | 4,132.61 mi (6,650.80 km) |
| Royal Palm Beach to Marinha Grande | 4,110.48 mi (6,615.17 km) |
| Royal Palm Beach to Massama | 4,105.70 mi (6,607.48 km) |
| Royal Palm Beach to Matosinhos | 4,104.48 mi (6,605.51 km) |
| Royal Palm Beach to Mealhada | 4,127.37 mi (6,642.36 km) |
| Royal Palm Beach to Melgaco | 4,115.29 mi (6,622.92 km) |
| Royal Palm Beach to Melres | 4,121.28 mi (6,632.55 km) |
| Royal Palm Beach to Mira | 4,112.09 mi (6,617.76 km) |
| Royal Palm Beach to Miranda do Corvo | 4,137.11 mi (6,658.03 km) |
| Royal Palm Beach to Mirandela | 4,178.12 mi (6,724.03 km) |
| Royal Palm Beach to Mogadouro | 4,203.78 mi (6,765.33 km) |
| Royal Palm Beach to Moimenta da Beira | 4,162.67 mi (6,699.18 km) |
| Royal Palm Beach to Moita | 4,122.56 mi (6,634.62 km) |
| Royal Palm Beach to Moncao | 4,105.03 mi (6,606.40 km) |
